I have the infamous "fan only works on high" problem. I've read many other threads on this topic, as it is very popular, but just wanted to share my story and throw out a checklist for discussion.
My fan has been working fine on all speeds since I've had the Jeep (purchased last year from original owner) and I don't think it has had any issues previously as I have all repair records. Yes, literally ALL of them. The PO was very meticulous. Anyways, the other day I had to bleed the air out of my cooling system, so per the advice of fellow board members, I parked the Jeep on an incline, removed the cap from the radiator and ran the fan on high heat. This is where I think my problem started. After this I noticed that when I used the AC, there was a very faint burning smell coming from the vents. I brushed it off as some outside influence as I didn't have the climate control on recirculate. I also thought it could have been some of the residual coolant that had overflowed onto the fan and radiator. However, after using the recirculated air mode, the burnt smell was still there. At this point I was a bit concerned, but left it again to see if it would go away on its own.
Well, today while driving down the highway, I had my AC going at the number 2 or 3 speed and then all of a sudden it just stopped. No burning smell at this point though. After trying the different modes to no avail, I realized the fan did work on the high setting just fine, But geeez that high setting is really HIGH! Since I can't live with just a high setting, which means either freeze or burn your *** off, I did some research on what the culprit could be. As many of you know, the blower motor resistor is often the issue. But before I start tearing my Jeep apart, ordering parts, and spending money I don't need to, I wanted to see if this list of things to check first is a good one.
Here's what I've gathered:
1. Check the fuses both F8 in the dash and F11 under the hood.
2. Check fan motor for wear, debris, etc. and see if starts up fine.
3. Check blower motor resistor. (Most likely the culprit in my case).
4. Check climate control switches for melting or burnt wires.
So that's my checklist as of now. Anything I'm missing?
Also, is it recommended to replace the fan itself as that could be the main problem? I don't want to replace the resistor and then have it fail 2 months down the road like others have reported. Aside from putting in the relays found in this thread, http://www.jeepforum.com/forum/f9/ac...elting-608645/
, what's the best plan of action here?
I know this topic has been beat to death, but just wanted to throw out a checklist to go by.